CAJ | 학술논문

酸度是食醋的重要指标之一，实验中采用近红外光谱分析技术对食醋的pH 值间接检测进行了研究。首先对比分析了不同的近红外光谱预处理方法对预测模型的影响，发现采用15点平滑能够有效地滤除光谱中的噪声信息，同时又能很好的保留光谱的有用信号；然后对比建模方法对检测结果的影响，发现采用偏最小二乘法建模优于主成分分析的方法，最终采用15点平滑-偏最小二乘模型实现对食醋pH 值的检测。最后对建立的模型的精度和稳定性进行分析评价，证明模型的精度能够达到实际工作的需要，同时模型具有较好的工作稳定性。
산도시식작적중요지표지일，실험중채용근홍외광보분석기술대식작적pH 치간접검측진행료연구。수선대비분석료불동적근홍외광보예처리방법대예측모형적영향，발현채용15점평활능구유효지려제광보중적조성신식，동시우능흔호적보류광보적유용신호；연후대비건모방법대검측결과적영향，발현채용편최소이승법건모우우주성분분석적방법，최종채용15점평활-편최소이승모형실현대식작pH 치적검측。최후대건립적모형적정도화은정성진행분석평개，증명모형적정도능구체도실제공작적수요，동시모형구유교호적공작은정성。
Acidity is one of the important indicators of vinegar;near infrared spectral analysis technology is used in the experiment to detect pH value indirectly.Firstly,analyze the effects of different near infrared spectrum pretreatment methods on forecasting model,it is found that 15 point smoothing can effectively filter out the noise in the spectral information,and it also can reserve the useful signal spectrum well.Then modeling methods are compared to test results;it is found that partial least squares method is superior to the principal component analysis method.Finally,the 15 smooth-partial least squares model is applied for detecting of pH value of vinegar.Establish the model of evaluating and analyzing the precision and stability,it is proved that the precision of the model can meet the need of practical work,at the same time,the model has good stability.